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Posted: 6/15/2009 6:12:23 PM EST


he RPN Method: An Overview and History
If you're a frequent calculator user, you owe it to yourself to investigate the advantages of RPN. RPN stands for Reverse Polish Notation. Reverse Polish Notation was developed in 1920 by Jan Lukasiewicz as a way to write a mathematical expression without using parentheses and brackets. Hewlett-Packard Co., realizing that Lukasiewicz's method was superior to standard algebraic(1) expressions when using calculators and computers, adapted RPN for its first hand-held scientific calculator, the HP35, in 1972.

Why Use RPN?

  • RPN saves time and keystrokes. You never have to account for the parentheses while doing calculations. The process is similar to the way you learned math on paper.
  • You can see the intermediary results as you perform your computations rather than just the answer at the end. This is an extremely helpful byproduct. Math teachers are using this feature to improve student understanding of mathematics.
  • An intermediate result allows the user to check the results and correct errors more easily. It's easier to follow the stream of calculation. The user defines the priority of operators.
  • RPN is logical because the user first gives the number and then tells what to do with it.

I can, been using HP calculators for years and years, I love my HP -12C. Brings out my inner geek. Equal signs are for sissys

Link Posted: 6/15/2009 6:16:48 PM EST
Since grade school. Back when Jimmyh Carter was in the Whitehouse.
Link Posted: 6/15/2009 6:18:13 PM EST
Link Posted: 6/15/2009 6:18:35 PM EST
Hell yes! Have 3 hp-12C's. One is almost 30 years old.
Link Posted: 6/15/2009 6:18:57 PM EST
Yes. And it IS easier and faster.
Link Posted: 6/15/2009 6:19:02 PM EST
It's all I have ever known since 1981.
Link Posted: 6/15/2009 6:21:02 PM EST
I made it all the way through college without using RPN. A year or so ago, the best free calculator i could find for my cell phone was RPN... I was surprised at how easy it was to use. It's easier than infix in some cases (for me).
Link Posted: 6/15/2009 6:21:19 PM EST
Yep. HP guy here.
Link Posted: 6/15/2009 6:27:29 PM EST
Been using an 11-C since 1981.
Link Posted: 6/15/2009 7:01:12 PM EST
Yup. Got my 12C right here.
Link Posted: 6/15/2009 7:03:17 PM EST
I hated those damn HP calculators in Nuc School.
Link Posted: 6/15/2009 7:03:46 PM EST
RPN is the bomb. It's actually so much easier once you get the hang of it. I wish I could find a freeware RPM calculator for the computer as I rarely pull out the actual calculator anymore.
Link Posted: 6/15/2009 7:06:35 PM EST
The only thing Polish I do is sausage and jokes.
Link Posted: 6/15/2009 7:08:57 PM EST
Electronic engineer here.
I hate RPN but all my engineering buddies love it.
Maybe I'm just strange but I have no use for High Priced (HP) RPN.
Link Posted: 6/15/2009 7:13:14 PM EST
Learned it on an HP-45.
Link Posted: 6/15/2009 7:14:27 PM EST
Originally Posted By Z_0:
Learned it on an HP-45.

Hardcore, but a 33 would be its equal.
Link Posted: 6/15/2009 7:15:48 PM EST
I had the programmer's 16-C for the longest time and after I noticed I never used it for 10 some years I sold it on eBay. Was cool to do math in Octal, Hex, and binary
Link Posted: 6/15/2009 7:24:22 PM EST
I do it all the time just didn't know the name so i voted no
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